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bolt carrier

A bolt is the part of a repeating, breech-loading firearm that blocks the rear opening (breech) of the barrel chamber while the propellant burns, and moves back and forward to facilitate loading/unloading of cartridges from the magazine. The extractor and firing pin are often integral parts of the bolt.
In gas-operated firearms, the bolt itself is housed within the larger bolt carrier group (BCG), which contains additional parts that receives rearward push from the gas piston.
The slide of a semi-automatic pistol is a form of bolt, as it contains the same parts and serves the same functions.

View More On Wikipedia.org
Recent contents
  1. Roadpirate2322

    Radian Bolt Carrier group

      1. For Sale
    • $120
    • Albany
    • Oregon
    Approx 750 rounds fired. $120 ftf in albany $130 shipped
  2. ScottInPDX

    Two 5.56/300BO AR15 BCGs

      1. For Sale
      2. For Trade
    • $130
    • Tualatin
    • Oregon
    I have a couple of AR15 BCGs that can go. #1: Aero Precision No-Logo Nitride, has seen less than 20 rounds. MPI marked bolt. $75 #2: I believe this is a Lead & Steel branded BCG, so probably ToolCraft OEM. No logo, phosphate coated, chrome lined gas key and bolt channel. MPI marked bolt...
  3. Tarcos

    Ballistic Advantage 308 Complete Bolt Carrier Group, Black Nitride

      1. For Sale
      2. For Trade
    • $140
    • Milwaukie
    • Oregon
    I never got around to using it so I decided to sell it here's a link to it on their website for specs https://www.ballisticadvantage.com/308-complete-bolt-carrier-group-black-nitride.html?avad=55097_b33a7bc89&avad=55097_a33d43955&avad=55097_e33f98ed9 Brand New $140 Won't Ship Open to Trades...
  4. Tarcos

    Ballistic Advantage 308 Complete Bolt Carrier Group, Black Nitride

      1. For Sale
      2. For Trade
    • $150
    • Milwaukie
    • Oregon
    I never got around to using it so I decided to sell it here's a link to it on their website for specs https://www.ballisticadvantage.com/308-complete-bolt-carrier-group-black-nitride.html?avad=55097_b33a7bc89&avad=55097_a33d43955 Brand New $150 Won't Ship Open to Trades Trade interest...
  5. Duneblaster

    PSA PA10 AR-10 .308 Nitride Bolt Carrier Group

      1. For Sale
    • $150
    • Roseburg
    • Oregon
    PSA PA10 AR-10 .308 Nitride Bolt Carrier Group Unfired. Taken from a PA10 .308 Upper. Has some wear from being in the upper receiver. $150 shipped.
  6. Tarcos

    Ballistic Advantage 308 Complete Bolt Carrier Group, Black Nitride

      1. For Sale
      2. For Trade
    • $150
    • Milwaukie
    • Oregon
    I never got around to using it so I decided to sell it here‘s a link to it on their website for specs https://www.ballisticadvantage.com/308-complete-bolt-carrier-group-black-nitride.html?avad=55097_b33a7bc89 Brand New $150 Won't Ship Open to Trades Trade interest: Firearms, Red Dot? Ammo 9mm...
  7. Duneblaster

    NEW Ballistic Advantage/Aero M5 .308 AR-10 Bolt Carrier Group Phosphate

      1. For Sale
    • $165
    • Roseburg
    • Oregon
    NEW Ballistic Advantage / Aero M5 .308 AR-10 Bolt Carrier Group Phosphate Ballistic Advantage is owned by Aero Precision. If you're looking for an Aero this will work perfectly. New in the package. Details: Carrier Machined from 8620 .308 Bolt Machined from 9310 Forged Gas Key Properly...
  8. Duneblaster

    TruCalibre AR-10 Billet Bolt Catch

      1. For Sale
    • $45
    • North Bend
    • Oregon
    TruCalibre AR-10 Billet Bolt Catch New in the package. $45 shipped.
  9. Tarcos

    Ballistic Advantage 308 Complete Bolt Carrier Group, Black Nitride

      1. For Sale
    • $175
    • Milwaukie
    • Oregon
    Brand New $175 Won't Ship Meet in Milwaukie No Trades I never got around to using it so I decided to sell it i don’t have a photo of it but here’s it on their site https://www.ballisticadvantage.com/308-complete-bolt-carrier-group-black-nitride.html
  10. DIYshooter

    SILENCERCO BOLT CARRIER GROUP

      1. Want to Buy
    • Boise / Meridian
    • Idaho
    I’m looking for a Silencerco BCG to complete my Silencerco rifle build. I’m willing to pay for shipping.
  11. Gunbuggy

    Toolcraft Premium Nickel Boron Bolt Carrier Group w/ carpenter 158 bolt

      1. For Sale
      2. For Trade
    • $60
    • Vancouver
    • Washington
    I found this while tearing through some older rifles and uppers I don't use anymore. I bought this new from PSA and it was in a loaner rifle i dont use anymore. Its probably seen 3 or 4 hundred rounds if i had to guess. I'm not really a nickel boron BCG kinda guy. I get they're smooth and easy...
  12. Duneblaster

    V-Seven AR10 S7 Tool Steel Bolt Catch

      1. For Sale
      2. For Trade
    • $28
    • Roseburg
    • Oregon
    V-Seven AR10 S7 Tool Steel Bolt Catch. Installed once. $28 shipped. Paypal or Zelle.
  13. Tarcos

    Ballistic Advantage 308 Complete Bolt Carrier Group, Black Nitride

      1. For Sale
    • $180
    • Milwaukie
    • Oregon
    It's Brand New $180 Won't Ship No Trades
  14. Tarcos

    Ballistic Advantage 308 Complete Bolt Carrier Group, Black Nitride

      1. For Sale
    • $200
    • Milwaukie
    • Oregon
    It's Brand New $200 Won't Ship No Trades
  15. Tacompton173

    Adam's Arms Mid Length Piston Kit, Adjustable Pic Rail Gas Block and Adams Arms bolt carrier

      1. For Sale
      2. For Trade
    • $70
    • Sumner
    • Washington
    Handguard sold. Adams Arms piston kit with front rail block, mid length short strike piston rod with Adam's Arms bolt Carrier (no bolt). This is a .750 gas block diameter. $80 $70 for the piston kit, rod, and carrier. Pickup in Puyallup or Sumner. Will ship for $20. Trade for a quality weapon...
  16. Diablo360

    WTS - WTS - Lots of BRAND NEW Wilson Combat AR Parts

      1. For Sale
    • $100
    • Kirkland
    • Washington
    I got a little too optimistic with the number of SBR builds I was going to finish, so I'm letting go of some parts that I'm not using. Was going to build 7 SBR's so I bought 7 sets of these parts, and will probably let go of 3-4 of each. These are BRAND NEW and UNOPENED. Not "open box" or...
  17. J

    AR bolt carrier group

      1. For Sale
    • $40
    • Beaverton
    • Oregon
    Selling bcg from an upper that is being parted out. Manufacturer unknown, carrier is coated in some sort of ceracoat, Bolt is phosphate finish. Ran about 200 rounds of wolf and Tula to test it. For full disclosure, it did not lock back reliably with Tula ammo. Upper it was in had a smallish...
  18. withoutremorse

    WTB or WTT for F/A Mp5k Bolt Carrier

      1. Want to Buy
      2. Want to Trade For
    • Manning
    • Oregon
    looking for a full auto bolt carrier for an mp5k/clones
  19. TeamWendyUser

    Daniel Defense Bolt Carrier Group

      1. For Sale
    • $150
    • Boise
    • Idaho
    I have a lightly used, albeit somewhat dirty DD BCG. Seen about 500 rounds. Works perfectly (obviously) No trades and no, I will not come down on price. $180 shipped.
  20. T

    Ar-15 bolt carrier group

      1. For Sale
    • $50
    • Albany
    • Oregon
    I don’t know the manufacturer, it’s unused. Has some marks on it from being stored with other parts. I think was from ar15.com?
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